Am Sa., 25. Apr. 2020 um 08:52 Uhr schrieb www <ouyangxua...@163.com>:

> Apr 02 17:24:52 demoboard systemd[1]: System time before build time, 
> advancing clock.

See https://github.com/systemd/systemd/blob/master/src/core/main.c#L1485
or more specifically
https://github.com/systemd/systemd/blob/master/src/shared/clock-util.c#L145

If you want to change time_epoch, use the meson "time_epoch" build option.
time_epoch is currently derived frome the date, when the NEWS file was
last modified.
But you could set that to say 1.1.1970.


> Apr 02 17:25:02 demoboard systemd[1]: logrotate.timer: Not using persistent 
> file timestamp Sat 2020-04-25 13:45:26 CST as it is in the future.
> Apr 02 17:25:04 demoboard systemd[1]: Reached target Timers.
> Apr 02 17:25:38 demoboard systemd[1]: Starting Time & Date Service...
> Apr 02 17:25:40 demoboard systemd[1308]: systemd-timedated.service: 
> ProtectHostname=yes is configured, but the kernel does not support UTS 
> namespaces, ignoring namespace setup.
> Apr 02 17:25:42 demoboard systemd[1]: Started Time & Date Service.
> Apr 02 17:26:13 demoboard systemd[1]: systemd-timedated.service: Succeeded.
> Apr 02 17:27:03 demoboard systemd[1]: Starting Time & Date Service...
> Apr 02 17:27:03 demoboard systemd[1823]: systemd-timedated.service: 
> ProtectHostname=yes is configured, but the kernel does not support UTS 
> namespaces, ignoring namespace setup.
> Apr 02 17:27:03 demoboard systemd[1]: Started Time & Date Service.
>
> It can be seen from the log that after the TimeSync service is disabled, the 
> latest time is obtained from NTP server, but it is not updated to the system. 
> But the system time has also been modified.

systemd-timedated.service has nothing to do with NTP.
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